Two Liverpool fans have been stabbed in Naples ahead of Thursday's Europa League tie with Napoli.
Italian police have confirmed the pair were injured during overnight scuffles in the city.
A third supporter is reported to be in a non-serious condition in hospital following a separate incident involving a gang of local youths.
Meanwhile, a group of English tourists mistaken for football supporters were confronted by a group of stone-throwing youths.
The local police were already on high alert after Napoli fans caused damage inside their own Stadio San Paolo ground over the weekend.